Interstellar has previously been described as a complex and multi-layered original science-fiction film about time travel and alternate dimensions, in which a group of space explorers travel through a wormhole. It will be written by the British film-maker's younger brother and regular collaborator Jonathan, riffing off scientific theories developed by Kip Thorne, a theoretical physicist, gravitational physicist and astrophysicist at Caltech, the California Institute of Technology.